KR101118614B1 - Manufacturing method for composite using nano particles and composite manufactured by method thereof - Google Patents

Abstract

The present invention, the first step of forming a micro powder; Forming a heterogeneous nanoparticle having a different chemical composition from the micro powder; Depositing nanoparticles on the surface of the micropowder particles to form a mixed powder; And a fourth step of sintering the mixed powder. The present invention relates to a method for producing a composite between different materials using nanoparticles, and a composite between different materials manufactured using the same.

According to the present invention, it is possible to produce a homogeneous final composite by suppressing contamination by impurities, and also to reduce the sintering temperature and increase the sintering speed due to the finer powder, and to improve the compatibility of the composite between different materials. It is possible to adjust the microstructure artificially.

Description

Manufacturing method between different materials using nanoparticles and composite between different materials manufactured using the same {Manufacturing method for composite using nano particles and composite manufactured by method

The present invention relates to a method for producing a composite between heterogeneous materials using nanoparticles, and more particularly, to a composite of a metal and a metal having a different chemical composition, or a combination of a metal and a ceramic material. By depositing heterogeneous nanoparticles and then sintering process, it is possible to suppress the influx of unwanted impurities in the powder treatment process, to induce the effect of reducing the sintering temperature according to the finer powder, the final molded composite The present invention relates to a method for producing a composite between different materials using nanoparticles, which enables artificial control of the homogeneity and microstructure of the composite material, and a composite between different materials prepared using the same.

A heterogeneous composite refers to a composite of a metal and a metal having a different chemical composition, or a combination of a metal and a ceramic material. When manufacturing the heterogeneous composite using powder metallurgy, a dry or wet mixing process is used. Pre-treatment is performed by mixing the target powder and then molding or by applying a high energy process such as a ball milling process.

However, the powder treatment process through the above general process may contain impurities in the process of preparing the powder, it is difficult to uniformly mix due to the characteristic difference between the powders, there is a problem that the microstructure homogeneity of the final molded product is relatively inferior.

On the other hand, the composite between heterogeneous materials can be largely divided into structural materials and functional materials, depending on the application field, and among them, structural materials generally require high strength, so high relative density and fine grains are required during powder sintering.

However, when manufacturing a composite between dissimilar materials according to a conventional high energy process, there is a problem that a thermal activation reaction in which grains grow inside a powder is caused by a high sintering temperature, and the higher the sintering temperature, the higher the sintering temperature. The mold to be used is inevitably limited, and there is also a problem in that energy efficiency is also reduced.

In preparing a composite between different materials having different chemical compositions as described above, the use of nanoparticles may be considered to solve various problems.

Nanoparticles exhibit very different physical properties from bulk materials with the same chemical composition by so-called size effects. For example, in the case of pure metal of copper, the melting temperature is known to be 1,063 ° C, but when the particle size is 10 nm or less, the melting point drops rapidly to 1,000 ° C or less.

Researches utilizing new properties of nanomaterials have been widely conducted in the fields of electrical and electronics, biotechnology, optics, chemicals and structural materials. Therefore, in recent years, industrial demand for technology for synthesizing nanoparticles or applying nanoparticles is greatly increased, and various technologies for this have been proposed.

Synthesis of nanoparticles can be largely classified into dry process technology using physical phenomena and wet process technology based on chemical reactions, and in the case of metal nanoparticles, various dry technologies have been proposed.

However, in order to manufacture a composite between dissimilar materials using nanoparticles, a simpler process technology capable of considering economical aspects due to fine nanoparticles and also prevents contamination or deformation in the process, and a device for enabling the same Development is required.

The present invention has been made to solve the conventional problems as described above, to suppress the influx of unwanted impurities during the powder treatment process, to maximize the energy efficiency through the reduction of the sintering temperature, the fineness and fineness of the final molded composite It is an object of the present invention to provide a method for producing a composite between heterogeneous materials using nanoparticles to artificially control a tissue, and a composite between different materials prepared using the same.

Method for producing a heterogeneous inter-composite composite using nanoparticles according to the present invention for solving the above object, in a method for producing a hetero-material composite between different chemical composition, the first step of forming a micro powder; Forming a heterogeneous nanoparticle having a different chemical composition from the micro powder; Depositing nanoparticles on the surface of the micropowder particles to form a mixed powder; And a fourth step of sintering the mixed powder.

In the method of manufacturing a heterogeneous composite material according to the present invention, the third step may include depositing nanoparticles on the surface of the micropowder particles through a vapor phase condensation process using thermal plasma.

And in the method for producing a heterogeneous inter-composite composite according to the present invention, the fourth step is characterized in that the sintering is performed through a spark plasma process for applying a pulse current to the mixed powder.

In the method for manufacturing a heterogeneous inter-material composite according to the present invention, the second step may include: vaporizing a second phase material for forming nanoparticles into the chamber and vaporizing the second phase material; The phase material is condensed in the form of nanoparticles, so that the nanoparticles are preferably formed.

Here, the second phase material is preferably configured to be vaporized by the thermal plasma generated in the plasma torch.

And in the method for producing a heterogeneous inter-composite composite according to the present invention, the second phase material for forming the nanoparticles is preferably configured to be injected into the chamber in the form of any one of a gas phase, a liquid phase, a solid phase.

In the method of manufacturing a heterogeneous inter-composite composite according to the present invention, in the third step, the microparticles are injected into the chamber together with the refrigerant gas, and the nanoparticles are condensed on the surface of the microparticles. Is preferably configured to be deposited.

In addition, the heterogeneous inter-material composite manufacturing method according to the present invention, after the mixed powder formed in the chamber is discharged to the outside of the chamber, and then injected again into the chamber with the refrigerant gas; preferably further comprises a; .

In addition, the method for producing a composite between different materials according to the present invention is preferably configured such that the refrigerant gas and the micro particles are injected into the chamber in a direction opposite to the thermal plasma.

In addition, the heterogeneous inter-material composite manufacturing method according to the present invention, WC- Co micro-powder is formed in the first step, Co nanoparticles are formed in the second step, heterogeneous inter-material composite formed in the fourth step It is preferable that it is comprised so that it may become a WC-Co cemented carbide.

In addition, the method for producing a composite between different materials according to the present invention includes forming Ti-Al micro powders in the first step, Ti nano particles and Al nano particles in the second step, and forming the fourth step. It is preferable that the composite between different materials be configured to be a Ti-Al intermetallic compound.

In addition, the method for producing a composite between different materials according to the present invention may include forming ceramic micro powders in the first step, platinum nanoparticles in the second step, and forming a composite material between the different materials in the fourth step. It is preferable that it is comprised so that it may become a catalyst for exhaust gas purification.

In addition, in the method for producing a heterogeneous inter-composite composite according to the present invention, a micro powder of Cu or Ni metal is formed in the first step, and zirconia nanoparticles having a non-equilibrium monoclinic phase are formed in the second step. The heterogeneous inter-material composite formed in the fourth step is preferably configured to be a carbon dioxide reduction catalyst.

In another aspect, the present invention is characterized by providing a composite between different materials prepared by any one of the manufacturing method described above.

According to the method for producing a heterogeneous inter-composite composite using the nanoparticles according to the present invention having the configuration as described above, and a heterogeneous inter-composite composite prepared using the same, a mixed powder in which heterogeneous nanoparticles are uniformly deposited on the surface of the microparticles By providing the, it is possible to ensure the homogeneity and mechanical properties of the final composite produced through the sintering process.

In addition, according to the present invention, it is possible to produce a homogeneous final composite by suppressing contamination by impurities when preparing a mixed powder using different powders having different chemical compositions.

In addition, according to the present invention, it is possible to reduce the sintering temperature and increase the sintering speed according to the powder miniaturization, thereby increasing the energy efficiency.

In addition, according to the present invention, the material combination of the micro powder and the nanoparticles, and the particle size control of the powder can be artificially adjusted the compatibility and microstructure of the composite between different materials.

In addition, according to the present invention, there is an effect that the formation of nanoparticles and nanoparticle deposition on the surface of the microparticles is made in a single process.

In addition, according to the present invention, since the exhaust nozzle for injecting the refrigerant gas and the microparticles together into the chamber is composed of a plurality of tube structure, the effect of being able to form a uniform density distribution structure over the entire part of the chamber have.

In addition, according to the present invention, by repeatedly performing the process of depositing the nanoparticles on the mixed powder, there is an effect that it is possible to form a mixed powder in which the nanoparticles are more uniformly deposited on the surface of the microparticles.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment for the heterogeneous inter-composite composite production method using the nanoparticles according to the present invention and the inter-composite composite prepared using the same.

1 illustrates a method for producing a composite between different materials according to the present invention.

Referring to Figure 1, the method for manufacturing a heterogeneous inter-material composite manufacturing method according to the present invention proceeds to the following process.

First, a micro powder is formed (S10), and different types of nanoparticles having different chemical compositions from the micro powder are formed (S12). That is, two materials having different chemical compositions are molded into micro- and nano-sized particles, respectively.

For example, a combination of metal nanoparticles and metal microparticles having different chemical compositions, ceramic nanoparticles and metal microparticles, metal nanoparticles and ceramic microparticles, and ceramic nanoparticles and ceramic microparticles having different chemical compositions are possible.

Thereafter, the nanoparticles are deposited on the surface of the micropowder particles to form a mixed powder (S14). In this case, in order to ensure homogeneity of the composite, it is important to uniformly distribute the nanoparticles on the surface of the micropowder particles.

In order to secure the uniform distribution of the nanoparticles as described above, the nanoparticles may be deposited on the surface of the micropowder particles by using a wet mixing process or a dry mixing process. However, when the nanoparticles are uniformly distributed through the wet process, impurities may be introduced, and the surface of the nanoparticles may be contaminated due to oxidation during the treatment.

Therefore, in the present invention, in order to increase the uniformity of the powder treatment and to suppress the inflow of unwanted impurities in the powder treatment process, it is preferable to be configured to deposit nanoparticles on the surface of the micro powder particles through a dry mixing process.

On the other hand, in the dry mixing process for depositing nanoparticles on the surface of the micro powder particles, a vapor deposition process using a vacuum deposition process or a thermal plasma may be used. In particular, the vapor phase condensation process using the thermal plasma, the thermal plasma flame has a high thermal energy of more than 10,000K, there is an advantage of low material limitation in implementing the vapor phase condensation phenomenon.

On the other hand, both the DC and RF plasma may be used as the thermal plasma in the gas phase condensation process, but in the case of DC plasma, it is generally difficult to generate a homogeneous gas phase due to the injection of a charge material perpendicular to the flame axis. have.

Therefore, in the present invention, the RF plasma is used as a thermal plasma for the vapor condensation process, and thus, when the RF plasma is used, a more homogeneous gaseous distribution can be obtained, and as a result, uniform nanoparticles can be deposited.

On the other hand, in the present invention, it is preferable that the formation of the nanoparticles and the process of depositing the nanoparticles on the surface of the micropowder particles using the vapor phase condensation process are performed in a single process.

As described above, an embodiment of a process of depositing nanoparticles on the surface of the micropowder particles using the vapor phase condensation process will be described.

2 shows a configuration of a mixed powder manufacturing apparatus for depositing nanoparticles on the surface of microparticles. And Figure 3 shows the configuration of the exhaust nozzle of the mixed powder manufacturing apparatus according to the present invention, Figure 4 shows the water density distribution of the microparticles injected through the exhaust nozzle of the mixed powder manufacturing apparatus according to the present invention.

Referring to Figure 2, the mixed powder manufacturing apparatus for depositing nanoparticles on the surface of the microparticles according to the present invention, for producing a mixed powder for producing a composite between different materials made of a different chemical composition by a sintering method The device relates to a chamber 30 in which nanoparticles are deposited on a surface of microparticles so that a mixed powder is formed, a nanostorage part 10 for supplying a second phase material for forming nanoparticles to the chamber 30, A plasma torch 20 for generating a thermal plasma for vaporizing the second phase material supplied to the chamber 30 and a refrigerant gas for condensing the vaporized second phase material in the form of nanoparticles to the chamber 30. The gas storage unit 50, the micro storage unit 60 for supplying the micro particles to the chamber 30, the exhaust nozzle 40 for injecting the refrigerant gas and the micro particles into the chamber 30, the vaporized second phase material Go To condense into nano-particles at the surface of the micro particles is configured to include a control unit 90 for discharging the refrigerant gas with the microparticles into the chamber (30).

Here, the first phase material in the form of microparticles and the second phase material in the form of nanoparticles may be composed of a combination of metal and metal, ceramic and ceramic, and metal and ceramic having different chemical compositions.

The second phase material for forming the nanoparticles is stored in the nano storage unit 10 in the form of any one of a gas phase, a liquid phase, and a solid phase, and then supplied to the chamber 30. As such, the second phase material supplied from the nano storage unit 10 to the chamber 30 is vaporized through phase transformation inside the chamber 30 by thermal plasma generated by the plasma torch 20.

On the other hand, both the DC and RF plasma may be utilized as the thermal plasma generated by the plasma torch 20, but in the case of DC plasma, the generation of a homogeneous gas phase is generally caused by the injection of a charging material in a direction perpendicular to the flame axis. It has a hard disadvantage.

Therefore, the present invention uses a high-frequency RF plasma so that the second phase material can be injected in the direction parallel to the flame axis, and when using the RF plasma can have a more homogeneous distribution of gaseous phase, resulting in uniform Deposition of one nanoparticle is possible.

The second phase material injected into the chamber 30 and vaporized by the thermal plasma is condensed in the form of nanoparticles by the refrigerant gas supplied from the gas storage unit 50 to the chamber 30. More specifically, the second phase material vaporized by the thermal plasma is condensed back to the solid phase at a low temperature region by the temperature gradient of the plasma flame, wherein the refrigerant gas is a means for controlling the particle size of the condensed second phase material. As a result, the second phase material is eventually formed in the chamber 30 in the form of nanoparticles.

That is, the second phase material for forming the nanoparticles is injected into the chamber and then vaporized by thermal plasma, and the second phase material vaporized by the refrigerant gas injected into the chamber is condensed in the form of nanoparticles, thereby providing nanoparticles. Is formed.

Meanwhile, the controller 90 controls the gas storage unit 50, the micro storage unit 60, the exhaust nozzle 40, etc. to discharge the refrigerant gas and the micro particles together into the chamber 30 through the exhaust nozzle 40. By controlling, the vaporized second phase material is condensed into nanoparticles on the surface of the microparticles.

That is, the microparticles are injected into the chamber together with the refrigerant gas, and the nanoparticles are condensed on the surface of the microparticles, whereby the nanoparticles can be deposited on the surface of the micropowder particles.

Therefore, inside the chamber 30, the vaporized second phase material is condensed into the nanoparticles by the refrigerant gas, and at the same time, a reaction occurs in which the condensed nanoparticles are deposited on the surface of the microparticles injected with the refrigerant gas. On the surface of the particles, a mixed powder in which nanoparticles are uniformly deposited is formed.

Thus, according to the mixed powder manufacturing apparatus according to the present invention, by inducing the gas phase particles of the second phase material to react with the micro particles in the condensation step by using the thermal plasma and the refrigerant gas, the nano particle condensation of the gas phase particles is the surface of the micro particles And the nanoparticle deposition on the surface of the microparticles can be performed in a single process.

On the other hand, in the present invention, it is preferable that the refrigerant gas and the micro particles are configured to be sprayed in a direction opposite to the thermal plasma. That is, when a thermal plasma is formed on one side, and the second phase material is injected into the chamber 30 in the same or horizontal direction as that of the thermal plasma and vaporized, the injection of the refrigerant gas including the micro powder causes the flow of the gas phase particles. Injection in the opposite direction has the advantage of relatively widening the range of reaction time.

In the case of spraying the microparticles through the refrigerant gas, the gas momentum caused by the refrigerant gas flow generally interacts with the surrounding gas, indicating a momentum distribution of the Gaussian distribution in the radial direction along the central axis of the gas flow. As a result, the water density and kinetic energy of the microparticles along the cross section of the gas flow field have a distribution similar to that of the gas flow field momentum.

Therefore, in order to uniformly control the reaction with the gas phase particles moving along the thermal plasma, a method of uniformly controlling the spatial density distribution of the microparticles injected through the refrigerant gas is preferable.

For this purpose, as shown in Figure 3, it is preferable that the exhaust nozzle 40 for injecting the refrigerant gas and the micro particles together into the chamber 30 is configured to consist of a plurality of tube structures instead of a single tube structure.

As such, when the exhaust nozzle 40 has a plurality of tube structures, as shown in FIG. 4, the distribution of the water density injected through each single tube is overlapped, and as a result, over the entire portion of the chamber 30. A uniformly distributed water density structure can be formed.

In addition, it is important that the nanoparticles are uniformly deposited on the surface of the microparticles. Depending on the material of the nanoparticles and the microparticles or the amount of nanoparticles applied, the nanoparticles are uniformly deposited on the surface of the microparticles in one step. Cases in which the powder is difficult to produce may occur.

In order to solve this problem, the present invention is preferably configured to repeatedly perform the process of depositing nanoparticles again for the mixed powder formed through the above process.

To this end, in the mixed powder manufacturing apparatus according to the present invention, the mixed powder formed in the chamber 30 is discharged to the outside of the chamber 30 and the outside of the chamber 30 through the suction nozzle 70 Further comprising a powder storage unit 80 for storing the mixed powder discharged to the, the control unit 90 stores the powder so that the mixed powder and the refrigerant gas stored in the powder storage unit 80 is discharged together into the chamber 30 The unit 80, the gas storage unit 50, the exhaust nozzle 40, and the like can be controlled.

That is, the mixed powder formed in the chamber 30 through the process of depositing nanoparticles on the surface of the microparticles as described above is discharged to the powder storage unit 80 outside the chamber 30 through the suction nozzle 70. After that, the control unit 90 controls the injection of the mixed powder stored in the powder storage unit 80 into the chamber 30 together with the refrigerant gas. Thereafter, the nanoparticles are deposited on the surface of the mixed powder injected into the chamber 30 together with the refrigerant gas, so that the nanopowder is more uniformly deposited on the surface of the microparticles. do.

And the microstructure of the heterogeneous inter-composite composite according to the present invention can be arbitrarily designed by adjusting the size of the micro powder forming the mixed powder, or by adjusting the deposition layer of the nanoparticles deposited on the surface of the microparticles. For example, in the case of making a fine structure of the complex, it is possible to use a micro powder of a fine size on a known phase, and to deposit the second phase nanoparticles on the surface of the fine micro powder through a vapor phase condensation process.

In addition, since the nanoparticles are laminated on the micropowder, the mixing is completed in the powder unit, so that homogeneity can be ensured in the solid state while the nanoparticles are deposited on the laminated microparticles.

As such, after the heterogeneous nanoparticles are deposited on the surface of the micropowder particles to form a mixed powder, the mixed powder is sintered to form a composite between different materials (S16).

The sintering process of the mixed powder is applied by a binary structure sintering technique that forms a preform at room temperature and sinters at high temperature, or a hot press for directly filling the powder and applying a thermo-mechanical cycle, spark plasma sintering, and high temperature isothermal sintering. This may be done by applying a process. In addition, the preform press-formed by pressing or CIP at room temperature may be performed in a manner of obtaining a final molded product through hot pressing, spark plasma sintering, and high temperature isotropy.

Among the various sintering methods as described above, in the present invention, it is preferable to perform the sintering process by applying a surface-activated process, particularly a spark plasma sintering process, in order to lower the sintering temperature. Using the spark plasma sintering process, resistance heating or arc due to current flowing along the interface can be utilized in the process of energizing the pulsed current to the micropowder filled with the nanoparticles deposited. By heating, the temperature gradient at the powder interface can be utilized.

In addition, when sintering using a mixed powder formed by depositing heterogeneous nanoparticles on the surface of the micropowder, sintering between the nanoparticles and sintering between the nanoparticles and the microparticles may be simultaneously performed.

At this time, the sintering between the nanoparticles due to the relatively small size compared to the microparticles increases the sintering stress (sinter stress) at the interface of the particles, resulting in the effect of increasing the sintering rate, and also nanoparticles and microparticles The sintering also occurs due to the difference in particle size, the effect of increasing the sintering rate as the mop-up phenomenon that the relatively large microparticles absorb and grow the relatively small nanoparticles occurs.

When the sintering is carried out using the micro powder in which the heterogeneous nanoparticles are deposited, the sintering can be progressed at a relatively low temperature while the sintering speed is promoted due to the particle size effect, thereby solving the problems caused by the conventional high temperature sintering. Will be.

The homogeneity and microstructure of the composite between the heterogeneous materials finally formed through such a process can be artificially adjusted according to the material combination of the microparticles and the nanoparticles, and thus the particle unit between the composite and the heterogeneous material is maintained. A molded article having an inclined structure or a single phase structure can be produced.

Hereinafter, look at embodiments to which the method for producing a composite between different materials configured as described above can be applied.

Composites between different materials can be classified into structural materials and functional materials, depending on the field of application. Structural materials generally require high strength and can increase strength by giving high relative density and fine grains during powder sintering. A representative example of such an application is WC-Co cemented carbide, which shows the form of liquid phase melting upon sintering.

Therefore, after forming the WC-Co micro powder and Co nano particles, respectively, by depositing Co nano particles on the surface of the WC-Co micro powder to form a mixed powder, the composite of the WC-Co cemented carbide by sintering the mixed powder Can be prepared. At this time, by depositing Co nanoparticles on the surface of the WC-Co microparticles, the sintering is made at a low temperature due to the finer particles according to the nanoparticles of Co particles can be promoted as well.

In another embodiment, when fracture of the structural material occurs, the fracture pattern often causes crack propagation between particle interfaces, and when corrosion progresses along the powder interface, the structure has a more sensitive structure to fracture. In this case, the material for strengthening the interface is formed of nanoparticles, and is deposited on the surface of the underlying micro metal to perform sintering, thereby improving resistance to breakdown or improving resistance to corrosion.

In addition, this invention can be applied also in shaping | molding of an intermetallic compound. For example, Ti-Al exothermic reaction occurs during compound formation, and the amount of heat generated at this time may be applied to sintering. That is, by depositing and sintering Ti nanoparticles and Al nanoparticles on the surface of the micro powder of the Ti-Al intermetallic compound, it is possible to reuse the sintering acceleration and the generation of reaction heat according to the particle size for sintering. Compositionally the same but systematically fine, it is possible to produce a composite of enhanced form.

Functionally, the catalyst powder is synthesized by depositing platinum nanoparticles on the ceramic micropowders or by depositing ceramic nanoparticles on the surface of the metal microparticles, and using the same as a technology for forming a porous body through an energized sintering process. This is possible.

The former can be used as a catalyst for automobile exhaust gas purification, and the latter can be used as a carbon dioxide reduction catalyst deposited with nanoparticles of zirconia having an unbalanced monoclinic phase on the surface of micro powder of Cu or Ni metal. Do.

5 illustrates an interfacial structure of a composite between dissimilar materials having no mutual solid solubility, and FIG. 6 illustrates an interfacial structure of a composite between dissimilar materials having a mutual solid solution.

Referring to Figure 5, when manufacturing a composite between different materials in a manner according to the present invention for a heterogeneous material that does not have a mutual solid solution, such as a combination of metal and ceramic, the sintering phenomenon of the nanoparticles present at the interface of the mixed powder Through this, macroscopic diffusion between microparticles and nanoparticles does not occur, thereby forming a composite having non-uniformity in terms of chemical composition. In this case, macroscopic tissue control between heterogeneous phases is possible through particle size control of a known micropowder used. Do.

That is, when the size of the microparticles is small, heterogeneous phase distribution has fine characteristics, whereas when the size of the microparticles is large, coarse distribution can be obtained.

Representative combinations of heterogeneous materials having no mutual solid solubility include the above-described catalysts for automobile exhaust gas purification or carbon dioxide reduction catalysts.

In addition, referring to FIG. 6, in the case of manufacturing a composite between dissimilar materials in a manner according to the present invention for dissimilar materials having mutual solid solubility, such as a combination of metals and metals having different chemical compositions, the interfacial material may be diffused in the sintering process. It can cause diffusion layer or gradient of compatibility.

The formation of the diffusion layer can be controlled according to the heat cycle, and in particular, the spark plasma sintering process, which can generate heat at the powder interface during the sintering process, is advantageous in compositional gradient.

This technique can be implemented for various purposes, for example, when the damaged surface is large during the turbine blade repair process, the same powder as the base material is used as the micro powder, and the bond powder is deposited on the surface of the base micro powder. When used as the nanoparticles, the sintering is promoted according to the size effect of the nanoparticles, and the interdiffusion process of the nanoparticles and the micropowder enables a fast bonding process at a low temperature.

In addition, when the thermal cycle is adjusted to sufficiently diffuse at a high temperature, heterogeneous nanoparticles deposited on the surface sufficiently diffuse into the microparticles during the sintering process to form a completely solid solution, or to form an alloy or an intermetallic compound. It may be formed to produce a macroscopic homogeneous molded body after sintering.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.

1 is a flow chart showing a method for producing a composite between different materials using nanoparticles according to the present invention.

Figure 2 is a block diagram showing a mixed powder manufacturing apparatus for depositing nanoparticles on the surface of the microparticles according to the present invention.

Figure 3 is a cross-sectional view showing an exhaust nozzle of the mixed powder production apparatus for depositing nanoparticles on the surface of the microparticles according to the present invention.

Figure 4 is a graph showing the number density of the microparticles injected through the exhaust nozzle of the mixed powder production apparatus according to the present invention.

Figure 5 is a schematic diagram showing the interface structure of the composite between different materials without the degree of mutual solid solution.

Figure 6 is a schematic diagram showing the interface structure of the composite between different materials having a solid solution degree.

* Description of the symbols for the main parts of the drawings *

10; Nano storage unit 20; Plasma torch

30; Chamber 40; Exhaust nozzle

50; Gas storage unit 60; Micro storage

70; Suction nozzle 80; Powder storage

90; Control

Claims (14)

In the method for producing a composite between different materials having different chemical composition, Forming a micro powder; Forming a heterogeneous nanoparticle having a different chemical composition from the micro powder; Depositing nanoparticles on the surface of the micropowder particles to form a mixed powder; A fourth step of sintering the mixed powder; Method for producing a composite between different materials using nanoparticles comprising a. The method of claim 1, wherein the third step, Method for producing a composite between different materials using nanoparticles, characterized in that the nanoparticles are deposited on the surface of the micropowder particles through a vapor phase condensation process using a thermal plasma. The method of claim 1, wherein the fourth step, Method for producing a composite between different materials using nanoparticles, characterized in that the sintering is carried out through a spark plasma process that energizes the mixed powder pulse current. The method of claim 1, wherein the second step, The second phase material for forming nanoparticles is injected into the chamber, and then vaporized. The second phase material vaporized by the refrigerant gas injected into the chamber is condensed in the form of nanoparticles, thereby forming nanoparticles. Method for producing a composite between different materials using nanoparticles. 5. The method of claim 4, The second phase material is a composite material manufacturing method between different materials using nanoparticles, characterized in that the vaporized by thermal plasma generated in the plasma torch. 5. The method of claim 4, The second phase material for forming the nanoparticles is a composite material manufacturing method between heterogeneous materials using nanoparticles, characterized in that injected into the chamber in the form of any one of a gas phase, a liquid phase, a solid phase. The method of claim 4, wherein the third step, The microparticles are injected into the chamber together with the refrigerant gas, and the nanoparticles are condensed on the surface of the microparticles, so that the nanoparticles are deposited on the surface of the micropowder particles. 5. The method of claim 4, Step 3-1 after the mixed powder formed in the chamber is discharged to the outside of the chamber, and injected into the chamber again with the refrigerant gas; Method for producing a composite between different materials using nanoparticles, characterized in that it further comprises. 5. The method of claim 4, The method of manufacturing a composite material between different materials using nanoparticles, wherein the refrigerant gas and the microparticles are injected into the chamber in a direction opposite to the thermal plasma. The method according to any one of claims 1 to 9, In the first step, WC-Co micro powder is formed, In the second step Co nano particles are formed, The heterogeneous inter-composite composite formed in the fourth step is a method for producing a heterogeneous inter-composite composite using nanoparticles, characterized in that the WC-Co cemented carbide. The method according to any one of claims 1 to 9, In the first step, Ti-Al micro powder is formed, In the second step, Ti nanoparticles and Al nanoparticles are formed, Method for producing a heterogeneous inter-composite composite using nanoparticles, characterized in that the inter-composite composite formed in the fourth step is a Ti-Al intermetallic compound. The method according to any one of claims 1 to 9, In the first step, a ceramic micro powder is formed, Platinum nanoparticles are formed in the second step, The heterogeneous inter-composite composite formed in the fourth step is a method for producing a heterogeneous inter-composite composite using nanoparticles, which is a catalyst for purifying automobile exhaust gas. The method according to any one of claims 1 to 9, In the first step, a micro powder of Cu or Ni metal is formed, In the second step, zirconia nanoparticles having a non-equilibrium monoclinic phase are formed, The heterogeneous inter-material composite formed in the fourth step is a method for producing a heterogeneous inter-composite composite using nanoparticles, characterized in that the carbon dioxide reduction catalyst. delete

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